https://pixelbuddha.net/mockups/4576-photoshop-sticker-generator

• A flexible, high-impact tool for merch designers, music creatives, and anyone building visuals for sticker-ready graphics. This Photoshop-based generator lets you test and present designs in a bold, studio-style setting — be it fan merch, promo assets, or personal brand materials. Also, it's perfectly suited for album campaigns, tour visuals, label assets, or custom sticker drops.
• The PSD file is fully editable and built on a spacious 2500×2500 px canvas. You can swap out the main artwork, adjust the base shape, toggle built-in textures and patterns, and change sticker color independently. The mockup also includes an optional reflective background to simulate high-gloss material or foil-like finishes. Everything is organized and smartly layered.